1. 2 + 5 = 5 + 2 exexmolifies which property?
   
2. 2(75) = (27) 5 exemplifies which property?
   
3. 2(x + y) = 2x + 2y exeemplifies whcih property?
   
4. 2z + 0 = 2z exemplifies which property?
   
5. 141 = 14 exempifies which property?
   
6. 13 + -13 = 0 exempifies which property?
   
7. 5 1/5 = 1 ememplifies which property?
   
8. Simplify 18a + 31b + 14a - 2b
   
9. Simplify 14x - 2y + 21x + 7y
   
10. Simplify 15r + 7s + 9r - 7s